The effects of black tea polyphenol extract (BTPE) on the retrogradation of starches from different plant sources were studied using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). DSC analysis shows that the gelatinization temperature of maize starch and starches from different rice varieties increased with increasing BTPE level. After storage at 4 °C, BTPE at a concentrat...

A study was conducted to investigate the bioaccumulation of arsenic by twelve different high yielding, hybrid and local rice varieties, cultivated in the Nadia district, West Bengal (India). The results showed that rice plant accumulated arsenic from irrigation water but, the magnitude of accumulation was found to vary with the rice varieties. Some of the examined rice varieties (like IET 4094,...

A mapping population consisting of 236 F2:3 families derived from the cross between two rice varieties, Gharib as female parent (with good cooking quality) and Sepidroud as male parent (with poor cooking quality) was used to analyze the quantitative trait loci (QTLs) associated with amylose content (AC), gelatinisation temperature (GT) and gel consistency (GC). A total of 105 single sequence re...

Sub-Saharan Africa could have a shortfall of nearly 90Mt of cereals by the year 2025 if current agricultural practices are maintained. Biotechnology is one of the ways to improve agricultural production. Insect-resistant varieties of maize and cotton suitable for the subcontinent have been identified as already having a significant impact. Virus-resistant crops are under development. These incl...

in this research, allele frequency and polymorphism of 27 microsatellite markers linked to gene loci controlling grain quality were determined between 47 rice varieties from four different groups including 21 iranian local, 16 improved, 7 irri and 3 upland rice varieties. average number of polymorphic information content (pic) and shannon’s diversity index were 0.54 and 1.14, respectively. maxi...

The overuse of agricultural chemicals such as fertilizer and pesticides aimed at increasing crop yield results in environmental damage, particularly in the Sahelian zone where soils are fragile. Crop inoculation with beneficial soil microbes appears as a good alternative for reducing agricultural chemical needs, especially for small farmers. This, however, requires selecting optimal combination...

The study compares gross revenues from modern rice varieties and landraces and valuates different useful traits of rice landraces to demonstrate an empirical methodology for biodiversity valuation. A sample of 200 rice growers in hills and plain area was surveyed for commercialization of agro-biodiversity project. For estimating the value put by the consumers on different rice traits a hedonic ...

Blast disease, caused by hemibiotrophic fungus Pyricularia oryzae Sacc. (teleomorph: Magnaporthe oryzae (Hebert) Barr.), previously known as Magnaporthe grisea, is the most serious disease of rice and causes high yield losses in most rice growing regions every year. Blast is an endemic disease in all Iranian and Uruguayan rice fields, with yield losses up to 90 % that has been reported from som...

Basmati is one of the most popular types of rice in the world, representing approximately 40% of the dry rice market. Being twice as expensive as non-Basmati rice, it is also often mixed with other types of rice. Approximately 46% of sold Basmati rice is adulterated. The term Basmati is a customer generic name for 15 varieties of rice produced exclusively in India and Pakistan. Nine of the 15 v...

Genetic relatedness among Indian farmers’ rice varieties were assessed using 24 distinct rice microsatellite markers. The 41 rice genotypes studied included 14 improved varieties and 27 landraces collected from different parts of India. The number of alleles per microsatellite locus ranged from 2 to 4, averaging 2.79 alleles per locus. Polymorphism information content (PIC) values ranged from 0...